Multiple spindle drilling machine control



June 1, 1937. F x L 2,082,103

MULTIPLE SPINDLE DRILLING MACHINE CONTROL Filed-July 1, 1935 5 Sheets-Sheet 1 INVENTORS.

lo x I ATTORNEYS June 1, 1937. H. w. FO'X ET AL I I 2,082,103

MULTIPLE SPINDLE DRILLING MACHINE CONTROL w 14 1v 4m {1 y m J INVENTORS, VHIRAM W. Fox Ausrm A.RIDDELL v AT ORNE1 HOWARD D.CORW1N June 1, 1937. H. w. FOX ET AL MULTIPLE SPINDLE DRILLING MACHINE CONTROL 5 Sheets Sheet 3 Filed July 1, 1935 INVENTORS.

HIRAM W. Fox AU6T1N A. RXDDELL BY HOWARD .CORW'IN June 1,1937. H. w. FOX ET AL 2,082,103

MULTIPLE SPINDLE DRILLING MACHINE CONTROL Filed July 1, 1955 5 Sheets-Sheet 4 RAPID 51.0w NEUTRAL RAPID ADVANCE FEED RETURN INVENTORS. HIRAM W. FOX AUSTIN A. RIDDELL,

BY HOWARD D. CORWIN @iafid ATTORNEY? June 1, 1937. H. w. FOX AL 2,082,103

MULTIPLE SPINDLE DRILLING MACHINE CCNTROL I Filed July 1, 1935 5 Sheets-Sheet 5 Patented June 1, 1937 UNITED STATES PATENT OFFICE 2.0mm x v MULTIPLE armors panama mcnms coarser.

Hiram W. Fox, Austin A. Kidd ell, Howard D.

Corwin, Jackson, Mich, alsia'nors to Fox Machine Company, Jackson, Mich.

Application July 1, 1935, Serial No. 29,340

z Claims. (01. sc-sz) This invention relates to improved control means for multiple spindle drills, the invention- Objects pertaining to details will appear from the description to follow. I

We accomplish the objects of our invention by r the mechanism illustrated in the acompanying drawings. in which:

Fig. 1 is a detail perspective view of our improved control mechanism as applied to a multiple spindle drill, the multiple spindle drill being indicated diagrammatically in dotted lines.

Fig. 2 is an enlarged detail elevation view of the f control means separated from the variable pump and its control valve, the manual control lever and pedal and .the other parts being in broken .section.

Fig. 2A is a detail sectional elevation taken on line fill-2A of Fig. 2, showing details of the con-- 7 ,nection for operating the control plunger.

Fig. 3 is an enlarged vertical sectional elevation, being only partially in section on the plane indicated by line 33 in Figs. 2 and 4. 7

Fig. 4 is an enlarged detail elevation partly in section on line 3-4 of Fig. 3, the control means being at neutral or in starting position.

Fig. 5 is a detail view of the oscillatingcam means with the cam followers shown in section, other parts of the mechanism being omitted, the rocker arms being shownv in dotted lines, and the mechanism being shown in the position of camming the control to the neutral point or point of beginning.

Fig. 6 is an enlarged detail of the cam disk and cam follower, a portion of the arm being shown dotted, indicating the relation'of the. parts during the rapid advance.

Fig. 7 is similar to Fig. 6, showing the cam follower with the cam advanced to the position of the feed or slow advance for feeding purposes.

Fig. 8 is a detail view similar to Fig. 5, showing the cam trip in operative position which permits the load and fire means to act and throw the valve to the rapid return position.

Fig. 8A shows a modification of the cam.-disk,

' the same being'separated into a pair of plates adjustable on each other to provide a series alternately of rapid advances and slow feeds.

Fig. 9 is an enlarged detail diagram showing the different positions in relation to the valve that which is relatively slow.

the cross pin on the valve control means assumes.

Fig. 10 is an enlarged detail of the control and its latch, showing the relation of the parts when the valve is at neutral.

Fig.,11 isan enlarged detail similar to Fig. 10,

' of the relation of the parts when the valve is swung to the rapid advance.

Fig. 12 is an enlarged detail similar to Fig. 10, showing the relation of the parts fbr the feed 10 Fig. 13 is a similar view showing the position of the parts when the load and fire device has been tripp d and the valve is pushed to the rapid return. r

The parts will be identified by their numerals 15 of reference which are the same in all the views.

I is a multiple spindle drill shownin dotted lines. 2 is the usual reciprocating head therefor which is controlled by our improved control means. 3 is the control engine cylinder with its 20 piston. And 4 is the projecting piston rod connected to the movable head for its control by the action of the engine cylinder 3.

5 is a variable power pump preferably driven by. the electric motor 5'. line pump iscontrolied by 25 the valve control stem 6. The pump is connected by pipe I to the topof the cylinder 3 andlby pipe 3 to the bottom of the cylinder. The pump delivers oil or other medium in the required volume and at the requiredspeed to properly con- 30 trol the drill head 2 or other movable part of the machine tool. The pump is connected and controlled for a rapid return by delivery through pipe 8. Our connection automatically moves the control stem 3 to neutral position when the rapid 5 return is completed. We then shift the stem from the neutral to the rapid advance by manual operation; it is then controlled automatically to the slow feed: then by the load and fire means it is shifted to the rapid return; and after the 40 return is efiected, it is automatically shifted to neutral by the stop cam 43.

It is possible to operate the load and fire means manually at any time that it is desired to stop the machine and efi'ect the quick return. 45

The variable oil pump is no part of our invention as the same is a stock article and can be purchased in the market. We purchase and make use of the pump and complete unit manu- 50 factured by the Oilgear Company of Milwaukee, Wisconsin. A pump suitable for this device is shown in Ferris Patents No. 1,354,127, of April 12, 1932, and'Nc. 1,753,562, of April 8, 1930. Consequently, we do not illustrate the details thereof, 55

as it isnot necessary to thecomplete explanation of our invention.

9 is the reciprocating connecting rod connected to the movable head 2 or other movable part of the machine tool that it is desired to control. This connecting rod is provided with a rack l3 which reciprocates through the casing ll of our improved control unit. The rack is in mesh with a gear l2 which it oscillates back and forth and by this means effects the control of the valve stem 6 of the ilgear" unit by the cam action.

The gear i2 is keyed or otherwise secured to the shaft i3 carried in suitable bearing "which is secured to the casing II. The cam carrier or holder i5 is keyed to the front end of the shaft l3 and oscillates due to the action of the gear l2.

A central cam plate I6 is adiustably clamped in place by the clamp plate I! by the screws l3.

This cam plate has a lean portion IN and a projecting or fat portion I62 and controls the rocker arm i9 which is carried on cam controlled feed rockshaft 26. The rocker arm I3 is provided with a revolvable cam follower pin Isl and as the portion l6l, see Fig. 6, contacts with the follower pin IS, the mechanism is controlled for the rapid advance, and when the cam rocks so that the fat portion I62 engages thefollower the ates the main control plunger 23 ,which is connected to control the valve stem 6 of the Oilgear unit. This arm 21 extends downward, the lower end being bifurcated to embrace the main plunger 23 and being slotted at 23.where it engages the cross pin 33, so that when the cam controlled rockshaft 23 is rocked to and fro it controls the movements of the main plunger 23.

In Fig. 9 is a diagram showing the action. The pin 33 is much enlarged and its four separate positions are indicated by dotted lines, the arrows indicating the series oi movements step by step. Thus, as the rocker arm I3 is actuated by the cam l6, it controls the movement of the rapid advance'and the slow feed as indicated.

The: load and fire means is simple. The main control plunger 23 has an extension 23l of reduced dimension on which is a sliding collar 3| with engaging shoulder 32. Coiled compression spring 33,is disposed on the reduced shank portion 2" and reacts between the collar and the side of the casing, forcing the collar towards the right as seen in Fig. 4. A latch arm 34 with engaging notch 3 is carried by'the tripping rockshaft 36, being suitably secured thereto. The rockshaft 36 extends through the front of the casing and carries rockshaft arm 33 which is provided with a cam follower pin 31, the same being supported rotatably by the ball bearing 33, see particularly Fig. 3. Spring 343 is provided for latch 34.

Surrounding the cam holder I6 is a supporting ring 33 supported by the clamping screws 43. Between the ring 33 and the cam carrier plate I3 is formed the T-shaped annulus 4| which serves to engage the heads of adjusting bolts as 63 for carrying tripping cam 42 for tripping the cam follower ,3! and actuating the arm 36 to actuate the tripping rockshaft 36 to permit the action of the load and fire mechanism. 1 provide the stop cam 43 also held by screws 63 with a camming surface 43 for the actuation of the arm is on the cam controlled feed shaft 23 to shift the same to neutral position and stop the machine. The detail of how this is accomplished will be seen in Fig. 8. Trip cam 42 is adjustable along this annulus, as seen in Fig. 8 where it is acting upon the pin 31. When the cam holder I3 is rotated so that this trip cam 42 strikes and acts upon the pin 31,.it pulls down the latch arm 34 which has engaged the shoulder 32 as indicated in Figs. 11 and 12, whereupon the collar acted upon by the spring 33 drives the plunger 23 towards the right and shifts the pin 36 to the position of Rapid return. The motion of the cam holder I5 is at once reversed and this brings the stop cam 43 into action. The latter is adjustable along the same annulus as the trip cam 42 and has an angled front cam surface 44 which cams the pin i3! and thus reacts to swing the rockshaft 23 and its arm 21 to carry the pin 36 to the Neutral position as indicated diagrammatically in Fig. 9. The action of camming is clearly shown in Fig. 5.

The control plunger 23 is held yieldingly upward by the compression spring 24 as already described, the latter acting under the stop collar 2 at the top of the plunger. A cross pin 232 is carried by the plunger 23 and is disposed to act upon actuated by the hand lever 46 controlling rockshaft 46 which is provided with a bifurcated arm 41 which engages cross pin 43 on link extension 233 of the plunger 23 either to raise or to lower the same. The hand lever 46 is also provided with a cross pedal 43 which enables the operator to operate the same either with his foot or with the hand lever as desired.

With the structure standing at neutral, as seen in Fig. 10, the operator steps on the'left hand extension of the pedal 43 or moves the hand lever 43 to the left, as seen in' Fig. 1. This raises the arm 22 and swings the arm 21 towards the left, as seen in Fig. 4. This slides the control plunger 23 to the left and the plunger through its engagemerit with th collar 3| slides the collar to the left until the shoulder 32 thereon is engaged by the latch 34, compressing the spring 33 and loading the load and fire mechanism. This movement of the control plunger 23 sets the control at rapid advance as indicated in the left hand circle in Fig. 9. The plunger 23 is free to move through the collar 3| without unlatching the shoulder 32 from the latch 33 so that the plunger 23 may be moved to the right to put the control in the low speed working position when the cam l3 revolves. The cam l3 then revolves the lean portion i6l in engagement with the follower pin i3l which then passes on to the enlarged or fat portion I62 which shifts the pin 33 to the slow feed position and the pin continues in this path until the trip cam 42 acts upon'the pin or cam follower 31, trips the latch 34, and releases the collar 3|. The spring 33 then acts to throw the same to the extreme right position or what is indicated in Fig. 9 as the Rapid return. This reverses the movement of the cam as indicated by the arrow in Fig. 5, and the trip cam 43 is swung connecting levers shifts the pin 33 carrying with it the control plunger 6 to the neutral position, thus completing the cycle of the machine.

I extension 342 of the latch 34. The plunger 23 is into engagement with the pin l3l and through the the said collar, a control arm on the and tripping 1 In Fig; 8A we show the cam plate divided, the

two plates being each provided with a cam projection beyond the main cam surface andbeing adjustable by slots |63and set screws I64. When this cam, which is illustrated in, Fig. 8A, is em-,

, ployed it is possible to have a rapid advance] a ,slow working feed, a second rapid advanceand v variable pump, unit for delivering mediumto and a cam follower, a cam on said carrier to actuate j a. second-working feed. The cam may be ad- Justed to give these results and the high points a on the cam engage the cam follower I9l to accomplish this result.

We desire to claim the invention specifically and broadly as provided in the appended claims.

Having thus described our invention, what we desire to secure by Letters Patent is: v n

1. In a control means for a machine tool, the combination of an engine cylinder connected to control the movable part of said machine tool, a variable pump unit for-delivering medium to and from said engine cylinder, means having a projecting longitudinally adjustable stem for controlling the delivery of the said pump, a suitable casing having a rotary oscillating cam carrier thereon connected by rack and pinion to the movable part of said machine tool, a cam controlled feed rock'shaft' in said casing having an arm with the said arm to control the movement of the feed rockshaft to control the rapid advance and slow feed of the movable'part. of said machine tool.

dead center akigain control plunger for said stem, a rockshaft a on said cam controlled feed rockshaft to control the said main plunger and said stem on rocking of said rockshaft, a load and fire means- On saidmain plunger to carry said plunger and, saidstem from a forward feeding position past to a reverse position comprising a movable collar, and a compression spring for projecting the same, a tripping rockshaft in the said casing. a suitable latch thereon to "engage .rockshaft having a cam follower, a trip cam car-- ried by the cam carrier timed to trip the said latch to release the load and fire means, a trip cam on the said cam carrier positioned and timed to 'act upon the cam follower of the feed rockshaft arm to shift the same from reverse toneutral to stop the machine, acontrol plunger with connectionto V the main plunger to force it to the rapid feed position, and a tripcam'thereon to trip the load and fire means when pushed in the opposite direction. i

2. In a control meansfor a machine tool,.the combination of'an engine cylinder connected to control the movable part of the machine tool, a

. to actuate the said arm to control the movement rof the feed rockshaft to control therapid advance and slow fee d of the'movable part (if said machine tool; a main. control plunger for said stem, a rock- 'shait arm on said cam controlled feed rockshaft to control the said main plunger and said stem 'on rockin@ of said rockshaft, a load and flre .means on said main plunger to carry said plunger and said'stem from a forward feeding position past dead center to a reverse position, comprising a movable 'collar, and a compression spring for projecting the same, a tripping rockshaft in the said casing, a suitable latch thereon to engage the said'collar, a control arm on the said tripping rockshaft hav g; cam. follower, a trip cam carried by the cam carrier timed to trigthe said latch to release the load and flre means, and a tripcam on the said cam'carrier positioned and timed to act uponthe cam follower of the feed rockshaft arm to shift the same from reverse to neutral to a stop the machine.

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